20131011103 has 4 divisors (see below), whose sum is σ = 23006869840. Its totient is φ = 17255152368.

The previous prime is 20131011067. The next prime is 20131011127. The reversal of 20131011103 is 30111013102.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20131011103 - 2¹⁷ = 20130880031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20131011143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1437929358 + ... + 1437929371.

It is an arithmetic number, because the mean of its divisors is an integer number (5751717460).

Almost surely, 2^20131011103 is an apocalyptic number.

20131011103 is a deficient number, since it is larger than the sum of its proper divisors (2875858737).

20131011103 is an equidigital number, since it uses as much as digits as its factorization.

20131011103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2875858736.

The product of its (nonzero) digits is 18, while the sum is 13.

Adding to 20131011103 its reverse (30111013102), we get a palindrome (50242024205).

The spelling of 20131011103 in words is "twenty billion, one hundred thirty-one million, eleven thousand, one hundred three".